[ttml2] Pull Request: Add tts:background{Clip,Extent,Origin}.

skynavga has just submitted a new pull request for 
https://github.com/w3c/ttml2:

== Add tts:background{Clip,Extent,Origin}. ==
Add tts:background{Clip,Extent,Origin}.
Also add [background {painting,positioning} area] defines (as TBDs).

See Issue #175. 

See https://github.com/w3c/ttml2/pull/177

Received on Saturday, 10 September 2016 06:43:35 UTC